@Paganel -
These repositories are here
KDE/Repositories - openSUSE. These are not the Stable or Unstable repo's; note that these are all mutually exclusive. You still need the oss and non-oss repo's of course. And for the checkerboard glitch (until the Qt libraries are updated in Factory), the KDE:Qt repo.
In YaST Software Management you filter with the, er, Filter pull-down to the upper left. One of the choices is repositories. Click on '11.0 Factory 4.1 Desktop' and you'll see all the packages in the base KDE 4.1.x. Right-click anywhere in the list opens a context-menu, with the choice to update all in the list (that are already installed) for which there is a newer version available. Occasionally there will be a minor dependency problem which prevents updating some packages (this repo is not static, it is a constant work-in-progress). And once at least, the dependency was missed altogether and was not satisfiable from this repo anyway, i.e., the checkerboard problem here.
That's how it's done.